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Drk2; It looks like a fun project. The Red and Blue lasers will respond faster than the green laser you are currently using. In regards to the TTL modulation, most China vendors state 20 KHz or 20,000 modulations per second, so you should be OK there. Of course, the true test is to...

Animal safety is a valid concern with any hi-power lasers. Animals can quickly jump into harms way, from curiosity. Because of their night vision, they can gather significantly more power of the beam. LarryDFW Petowner

Your cells with positive buttons shipped already by 1st Class Mail. Let us know how they perform; LarryDFW

You should always check the specs of any circuit used with expensive laser diodes! I have used this circuit board with some limitations . . . It is a constant voltage design with some voltage overshoot. It is only speced for operation @4.5 VDC. Current limiting is 4 amps. Because of these...

Joed; Your 200mw Green laser will need ~1 watt of battery power for the IR diode that powers it. 1 Watt is easily supplied by the 3400 mah Panasonic cell. It will also give you the longest run times. Only the high output 3 Watt 445nm lasers with boost circuits will need the higher current...

Capacity is what is quantified by the mah rating. If a cell has a mah rating of 1000 . . . then it can deliver 1000 milliamps (1 amp) for 1 full hour. (1000ma) x (1 hour) = 1000 mah capacity. Duty cycle of a laser diode is usually determined by the total amount of metal heatsink attached...

I like the new LUC V4 charger. It has 2 Amp charging for high capacity 18650 & 26650 cells. The digital voltage display is also helpful when charging. LUC V4 Charger Review LarryDFW

Yes, shipping with a charger would qualify as "equipment". So 1 or 2 cells with a charger to Canada by US post office would be $8 for shipping up to 3 pieces. Thanks, Larry

ru; The 3400 mah Panasonics are best for your initial lasers. If you get hi-power 445nm lasers (over 2 watts) that use one 18650 cell, then I would get the 2900 mah cells for higher output currents. I do ship to Canada, but I have to pack the cells in equipment for post office shipping, so...

Ru; The best advice I can give you is to buy only "brand name" 18650 cells. My favorites are Panasonic, Sanyo & LG . Those cells are tested to UL1642 safety standards. I would trust these cells much more than any "ultrafire cell w/protection circuit board). I have used several hundred...

Now Stocking some new chargers, with Dual 1 amp charging capability for quicker results. I have tested these for proper charging voltage. http://www.cobbcarpet.com/charger1.jpg I think they are good value @ $10.95 each prepaid. LarryDFW

Tough; First of all, only use "name-brand" cells for safety. There are some restrictions to shipping #18650 cells. When we ship internationally, the cells must be installed in equipment, and secure against turn-on. We have inexpensive equipment to meet shipping requirements. LarryDFW

Slippery; If you want the safest Panasonic cell . . . then I would go with the 2900mah cell. It is not protected, but it has safer chemistry: lithium nickel manganese cobalt oxide (NMC), and has passed UL1642 safety standards. LarryDFW

Good job, RHD . . . Another nice thing about the AMC 7135 IC is that it has very little voltage drop (~0.15 VDC), and thermally protected. It does have a 6 VDC maximum input voltage. This enables it to be used with one #18650 cell easily. The IC's are also available in 380ma versions for...

Here is one of my Aixiz 3-element lenses dissasembled: The two lenses on the left are surface to surface. LarryDFW

That's what I use also . . . but you need a good design for strength. LarryDFW

I have seen many 4-pin inline laser diodes. Mitshubishi made some Reds and Red/IR diodes in 4-pin configurations. This old testing thread has a photo on the initial post: http://laserpointerforums.com/f50/flat-red-laser-diode-testing-2nd-phase-47044.html LarryDFW

Antharak; You will quickly see the increased energy capacity of the Panasonic 3400 mah cells. Plus you will have cells . . . which have passed stringent UL 1642 safety standards. LarryDFW

A good aspheric lens will concentrate more power on that spot for burning. The spot might be larger, but the optical power is not wasted by SIX optical surfaces it must transmit thru. The new aspherical G-9 should win the testing. LarryDFW

Here is more information than you wanted to know on 16340 cells and testing: CR123A and Rechargeable substitutes On your 18650 cell : you should get some output on a fully charged cell. I get about 600mw on my direct drive 445nm LD's. Larry